Toothbrush



FIG. 1 is a top plan view of a toothbrush showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is an elevational view as seen from the bristled end thereof; and

FIG. 5 is an elevational view of the opposite end thereof. 

The ornamental design for a toothbrush, as shown and described. 